[ 24.225329] BUG: Bad rss-counter state mm:00000000a1021a38 type:MM_FILEPAGES val:33 [ 24.226336] BUG: Bad rss-counter state mm:00000000a1021a38 type:MM_ANONPAGES val:22 [ 24.355875] ================================================================== [ 24.356886] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.357927] Read of size 8 at addr ffff88800c453798 by task sshd/219 [ 24.358874] [ 24.359118] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.360098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.361201] Call Trace: [ 24.361553] [ 24.361872] dump_stack_lvl+0x91/0xf0 [ 24.362414] print_report+0xcc/0x620 [ 24.362945] ? __virt_addr_valid+0x102/0x340 [ 24.363563] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.364250] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.364929] kasan_report+0xbe/0xf0 [ 24.365477] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.366192] vma_interval_tree_remove+0xc75/0xec0 [ 24.366893] vma_prepare+0xc54/0x11a0 [ 24.367474] __split_vma+0x5af/0x950 [ 24.368025] ? __pfx___split_vma+0x10/0x10 [ 24.368640] ? find_held_lock+0x2c/0x110 [ 24.369251] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.369913] ? lock_is_held_type+0x9f/0x120 [ 24.370543] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.371246] ? mtree_range_walk+0x632/0x900 [ 24.371899] ? mas_walk+0x5c7/0x7c0 [ 24.372451] do_vmi_munmap+0x1f1/0x2b0 [ 24.373038] mmap_region+0x1f9/0x2660 [ 24.373599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.374196] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.375034] ? __pfx_lock_acquire+0x10/0x10 [ 24.375664] ? __pfx_mmap_region+0x10/0x10 [ 24.376280] ? security_mmap_addr+0x7d/0xa0 [ 24.376898] ? get_unmapped_area+0x1f5/0x3f0 [ 24.377541] do_mmap+0x854/0xf00 [ 24.378051] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.378624] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.379276] ksys_mmap_pgoff+0x3af/0x500 [ 24.379888] do_syscall_64+0x3f/0x90 [ 24.380451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.381221] RIP: 0033:0x7fec547fcd82 [ 24.381765] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 24.384276] RSP: 002b:00007ffe8b9fd7c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.385332] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec547fcd82 [ 24.386332] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec53c36000 [ 24.387326] RBP: 00007fec53c36000 R08: 0000000000000009 R09: 0000000000001000 [ 24.388322] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610c0650f70 [ 24.389324] R13: 00007ffe8b9fd7e0 R14: 00007ffe8b9fd810 R15: 00007ffe8b9fdb70 [ 24.390345] [ 24.390689] [ 24.390940] Allocated by task 207: [ 24.391452] kasan_save_stack+0x22/0x50 [ 24.392070] kasan_set_track+0x25/0x30 [ 24.392647] __kasan_slab_alloc+0x59/0x70 [ 24.393270] kmem_cache_alloc+0x16b/0x370 [ 24.393874] vm_area_dup+0x20/0x160 [ 24.394407] __split_vma+0x170/0x950 [ 24.394956] split_vma+0xc6/0x110 [ 24.395482] mprotect_fixup+0x8d2/0xb30 [ 24.396078] do_mprotect_pkey+0x87e/0xd40 [ 24.396694] __x64_sys_mprotect+0x78/0xc0 [ 24.397311] do_syscall_64+0x3f/0x90 [ 24.397878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.398628] [ 24.398880] Freed by task 19: [ 24.399338] kasan_save_stack+0x22/0x50 [ 24.399938] kasan_set_track+0x25/0x30 [ 24.400525] kasan_save_free_info+0x2b/0x50 [ 24.401159] __kasan_slab_free+0x10a/0x190 [ 24.401798] kmem_cache_free+0x10d/0x4d0 [ 24.402405] rcu_core+0x8c8/0x2860 [ 24.402935] __do_softirq+0x1b7/0x7d4 [ 24.403523] [ 24.403781] Last potentially related work creation: [ 24.404482] kasan_save_stack+0x22/0x50 [ 24.405081] __kasan_record_aux_stack+0x8e/0xa0 [ 24.405767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.406533] remove_vma+0x139/0x170 [ 24.407065] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.407738] do_vmi_munmap+0x1f1/0x2b0 [ 24.408319] __vm_munmap+0x138/0x3a0 [ 24.408873] __x64_sys_munmap+0x59/0x80 [ 24.409469] do_syscall_64+0x3f/0x90 [ 24.410036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.410824] [ 24.411077] Second to last potentially related work creation: [ 24.411936] kasan_save_stack+0x22/0x50 [ 24.412553] __kasan_record_aux_stack+0x8e/0xa0 [ 24.413250] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.414025] remove_vma+0x139/0x170 [ 24.414611] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.415314] do_vmi_munmap+0x1f1/0x2b0 [ 24.415920] mmap_region+0x1f9/0x2660 [ 24.416496] do_mmap+0x854/0xf00 [ 24.417012] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.417622] ksys_mmap_pgoff+0x3af/0x500 [ 24.418236] do_syscall_64+0x3f/0x90 [ 24.418814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.419607] [ 24.419867] The buggy address belongs to the object at ffff88800c453740 [ 24.419867] which belongs to the cache vm_area_struct of size 168 [ 24.421704] The buggy address is located 88 bytes inside of [ 24.421704] freed 168-byte region [ffff88800c453740, ffff88800c4537e8) [ 24.423483] [ 24.423746] The buggy address belongs to the physical page: [ 24.424549] page:0000000076262fef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc453 [ 24.425875] memcg:ffff88801443fe01 [ 24.426404] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.427203] page_type: 0xffffffff() [ 24.427763] raw: 0100000000000200 ffff88800879fc80 ffffea00003c89c0 dead000000000006 [ 24.428757] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801443fe01 [ 24.429663] page dumped because: kasan: bad access detected [ 24.430328] [ 24.430546] Memory state around the buggy address: [ 24.431122] ffff88800c453680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.431999] ffff88800c453700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.432852] >ffff88800c453780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.433710] ^ [ 24.434210] ffff88800c453800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.435071] ffff88800c453880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.435940] ================================================================== [ 24.436929] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.398464] BUG: Bad rss-counter state mm:0000000079e77820 type:MM_FILEPAGES val:33 [ 26.400033] BUG: Bad rss-counter state mm:0000000079e77820 type:MM_ANONPAGES val:22 [ 26.891016] BUG: Bad rss-counter state mm:00000000255fb98d type:MM_FILEPAGES val:33 [ 26.892185] BUG: Bad rss-counter state mm:00000000255fb98d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41844' (ECDSA) to the list of known hosts. 2023/06/19 13:40:15 fuzzer started 2023/06/19 13:40:15 dialing manager at localhost:44161 2023/06/19 13:40:15 checking machine... 2023/06/19 13:40:15 checking revisions... [ 27.641488] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:40:15 testing simple program... [ 27.694266] cgroup: Unknown subsys name 'net' [ 27.729869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:40:14 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801cdbfe30 RCX=ffffffff812e0644 RDX=fffffbfff0b74981 RSI=0000000000000004 RDI=ffffffff85ba4c00 RBP=ffffffff85ba4c00 RSP=ffff88801cdbfce8 R8 =0000000000000001 R9 =fffffbfff0b74980 R10=ffffffff85ba4c03 R11=0000000000000000 R12=0000000000000293 R13=ffffffff84d653a0 R14=0000000000000000 R15=ffff8880188fed40 RIP=ffffffff812e064e RFL=00000006 [-----P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0bd0d3c900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffc85a9c000 CR3=000000000d910000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f01860c6ad0 CR3=000000000da1c000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2034313a30343a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a30343a3331203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000